Change default profile-dir

Change default profile-dir to be under
For Windows: %localappdata%\Telerik\Blackdragon
For Mac OSX: ~/.local/share/Telerik/Blackdragon

http://teampulse.telerik.com/view#item/279292
I think the check for LocalAppData is not necessary. If it is missing, the machine is broken by contract.
Also, if we are on Windows and and it is missing, we are going to use *ix code path which is even more weird.